Unit of competency Outline

Date retreived
22/07/2026 8:42 AM AWST

Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.

Take an impression for study models

Take an impression for study models

Unit of competency
National Code
HLTDEN012
State Code
AWA42
TGA Status
Replaced
DTWD Status
Transition (Replaced)
Current Release Number
1.00
Current Release Date
08/12/2015
View on TGA
State Implementation and Classification
Approved Date
22/06/2016
Field of Education
060705 - Dental Technology
Original Release Date
22/06/2016
Nominal Hours
70
Description
This unit of competency describes the skills and knowledge required to take an accurate impression of the teeth and their supporting structures for the construction of study models as prescribed by the dental practitioner.This unit applies to dental assisting work.The skills in this unit must be applied in accordance with Commonwealth and State/Territory legislation, Australian/New Zealand Standards and industry codes of practice.
Notes
Elements and Performance Criteria
1. Assess the patient
  • 1.1 Confirm patient’s medical history
  • 1.2 Provide full details of the procedure to the patient or carer
  • 1.3 Obtain and document consent following ethical and legal requirements
  • 1.4 Select the equipment and instruments for the impression
  • 1.5 Prepare personal protective equipment for the patient and members of the dental team
2. Select appropriate impression tray
  • 2.1 Check the position of the dental chair and patient for the procedure
  • 2.2 Check the tray for size and modify the impression tray to ensure accuracy and comfort
  • 2.3 Instruct patient on participation during the procedure
3. Prepare impression material
  • 3.1 Select impression material in accordance with desired outcome
  • 3.2 Mix the impression material to the correct consistency and quantity required according to manufacturers’ instructions
4. Perform impression-taking procedure
  • 4.1 Implement standard precautions during impression-taking
  • 4.2 Use syringe to remove saliva from the occlusal surfaces
  • 4.3 Load tray with an appropriate amount of impression material and seat the tray from the back using gentle pressure
  • 4.4 Ensure the impression extends to and surrounds dental hard tissue structures
  • 4.5 Ensure the impression has adequate extension into the buccal sulcus and vestibule
  • 4.6 Carry out muscle trimming after seating the impression
  • 4.7 Monitor and reassure the patient throughout the procedure
  • 4.8 Remove the impression when set
  • 4.9 Examine the patient’s mouth for injury and impression material debris following removal of the impression
  • 4.10 Restore the patient’s comfort and appearance
5. Assess the impression
  • 5.1 Assess the quality of the impression for the required study model
  • 5.2 Identify common impression-taking problems
  • 5.3 Document details of the procedure in accordance with standard procedures and relevant guidelines
6. Decontaminate the impression
  • 6.1 Implement standard precautions during impression-taking
  • 6.2 Rinsethe impression or denture in cold running tap water to remove all traces of saliva and blood
  • 6.3 Clean the impression in an appropriate solution
  • 6.4 Rinse the impression until all visible contamination is removed
  • 6.5 Identify and correctly label impression and record procedure
No information
No information
Replaces
State Code National Code Title Type
D5860 HLTDA415B Take an impression for study models Unit of competency
Replaced By
State Code National Code Title Type
ODI50 HLTDEN026 Take an impression for study models Unit of competency
State Code National Code Title Type
AYY9 HLT45015 Certificate IV in Dental Assisting Qualification